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Percentage Increase and Decrease Worksheet

Quantitative aptitude lesson 11: Percentage increase and decrease · Set 480 · 40 questions
TalentJR

The method (Start value is 100%): New value after a rise of p%: value + p% of value. After a fall: value − p% of value. Percent change = change ÷ starting value × 100. Two changes a% and b% one after the other: a + b + (a × b) ÷ 100, with a fall counted as minus.

NameDateTime takenScore ___ / 40
  1. 1.A price comes down by 25% and then comes down by 20% more. By what percent has it come down in all? =
  2. 2.A price goes up by 10% and then goes up by 40% more. By what percent has it gone up in all? =
  3. 3.A water tank holds 140 litres. 25% of the water is used. How many litres are left?
  4. 4.A price comes down by 30% and then comes down by 40% more. By what percent has it come down in all? =
  5. 5.A shop sells 800 cups of tea a month. Next month it sells 15% more. How many cups does it sell next month?
  6. 6.The price of a bicycle is ₹2620. It goes up by 30%. What is the new price (in ₹)?
  7. 7.A shop sells 3140 cups of tea a month. Next month it sells 10% more. How many cups does it sell next month?
  8. 8.A price goes up by 15% and then comes down by 5%. By what percent has it gone up in all? =
  9. 9.A town has 320 people. Its population grows by 25%. How many people live there now?
  10. 10.A water tank holds 4780 litres. 5% of the water is used. How many litres are left?
  11. 11.The price of a school bag changes from ₹4700 to ₹5640. By what percent did it go up?
  12. 12.A shop sells 1980 cups of tea a month. Next month it sells 30% more. How many cups does it sell next month?
  13. 13.The price of a school bag changes from ₹2120 to ₹1908. By what percent did it come down?
  14. 14.The price of a bicycle is ₹340. It goes up by 30%. What is the new price (in ₹)?
  15. 15.A water tank holds 3160 litres. 40% of the water is used. How many litres are left?
  16. 16.The price of a school bag changes from ₹100 to ₹75. By what percent did it come down?
  17. 17.A price goes up by 20% and then comes down by 15%. By what percent has it gone up in all? =
  18. 18.A water tank holds 3400 litres. 10% of the water is used. How many litres are left?
  19. 19.A price comes down by 30% and then comes down by 5% more. By what percent has it come down in all? =
  20. 20.A shop sells 520 cups of tea a month. Next month it sells 20% more. How many cups does it sell next month?
  21. 21.The price of a school bag changes from ₹3080 to ₹2464. By what percent did it come down?
  22. 22.A price goes up by 25% and then goes up by 10% more. By what percent has it gone up in all? =
  23. 23.A town has 3800 people. Its population grows by 20%. How many people live there now?
  24. 24.The price of a school bag changes from ₹2500 to ₹2875. By what percent did it go up?
  25. 25.A water tank holds 3920 litres. 30% of the water is used. How many litres are left?
  26. 26.A town has 1260 people. Its population grows by 40%. How many people live there now?
  27. 27.A price comes down by 20% and then comes down by 10% more. By what percent has it come down in all? =
  28. 28.The price of a bicycle is ₹3180. It goes up by 25%. What is the new price (in ₹)?
  29. 29.A price goes up by 25% and then goes up by 40% more. By what percent has it gone up in all? =
  30. 30.The price of a school bag changes from ₹3280 to ₹2952. By what percent did it come down?
  31. 31.A water tank holds 900 litres. 40% of the water is used. How many litres are left?
  32. 32.The price of a bicycle is ₹900. It goes up by 25%. What is the new price (in ₹)?
  33. 33.A price comes down by 15% and then comes down by 50% more. By what percent has it come down in all? =
  34. 34.The price of a school bag changes from ₹3260 to ₹3749. By what percent did it go up?
  35. 35.A price goes up by 5% and then goes up by 40% more. By what percent has it gone up in all? =
  36. 36.A water tank holds 1120 litres. 5% of the water is used. How many litres are left?
  37. 37.A price comes down by 30% and then comes down by 10% more. By what percent has it come down in all? =
  38. 38.A water tank holds 2940 litres. 50% of the water is used. How many litres are left?
  39. 39.The price of a school bag changes from ₹3300 to ₹2640. By what percent did it come down?
  40. 40.A town has 1700 people. Its population grows by 25%. How many people live there now?

Answer key

  1. 40
  2. 54
  3. 105
  4. 58
  5. 920
  6. 3406
  7. 3454
  8. 9.25
  9. 400
  10. 4541
  11. 20
  12. 2574
  13. 10
  14. 442
  15. 1896
  16. 25
  17. 2
  18. 3060
  19. 33.5
  20. 624
  21. 20
  22. 37.5
  23. 4560
  24. 15
  25. 2744
  26. 1764
  27. 28
  28. 3975
  29. 75
  30. 10
  31. 540
  32. 1125
  33. 57.5
  34. 15
  35. 47
  36. 1064
  37. 37
  38. 1470
  39. 20
  40. 2125

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